Knife-cleaning apparatus.



PATENTED FEB. 28, 1905.

F. W. MARGETTS.

KNIFE CLEANING APPARATUS.

APPLICATION FILED JAN. 7, 1904.

2 snn 'rwsnsnr 1.

PATBNTED FEB. 28, 1905.

P. MARGBTTS.

KNIFE CLEANING APPARATUS.

APPLICATION FILED JAN. 7. 1904.

2 SHBETSSHEET Z.

llllll \1 I NITED STATES Patented February 28, 1905.

PATENT rrrcn.

FREDERICK WILLIAM MARGETTS, OF EAST DULVVICH, ENGLAND, ASSIGNOR OFONE-HALF TO WILLIAM LANE MITCHELL AND CHARLES OLLIFFE, OF EAST DULWICHGROVE, SURREY COUNTY, ENGLAND.

. KNIFE-CLEANING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 783,446, dated February28, 1905. Application filed iIanllaly 7, 1904. Serial. N0. 188,059.

To all whom, it 777/(1/y concern.-

Be it known that I, FREDERICK WILLIAM MARGn'rTs, sanitary engineer, asubject of the King of Great Britain, residing atll Bawdale road, EastDulwich, in-the county of Surrey,

England, have invented certain new and useful Improvements in Machinesfor Scouring or Polishing Knives, of which the following is aspecification.

IO My invention relates to knife-cleaning apparatus which is soconstructed that a number of knives can be completely and thoroughlycleaned at one operation and without requiring to be shiftedlongitudinally in the apparatus. Furthermore, by my invention the knivesare reciprocated in a straight line over fixed pads, thereby avoidingthe production on the blade of the curved marks usually produced whenthe knives are cleaned by rotat- 2o ing disk pads.

In the accompanying drawings, Figure l is a sectional elevation of aknife-cleaning apparatus constructed according to my invention. Fig. 2is a plan of same. Fig. 3 is a section taken on the line 3 3 of Fig. 1.Fig. 4 is an elevation showinga modification of the knifeholder and thelever mechanism for reciprocating it. Fig. 5 is a plan of part of Fig.I, and Fig. 6 is a plan view of. another modifica- 3 tion of theknife-holder.

The same letters of reference are used to denote the same orcorresponding parts in all the figures.

A is an outer case or box having fitted in the lower part thereof apull-out drawer B,

which forms a receptacle for the polishingpowder used during thecleaning. When convenient, the drawer B can be removed and the contentsemptied into the polishing-powder 4 box C, which latter is provided withatroughshaped mouth C, discharging into the interior of the apparatusbetween and above the polishing-pads. The polishing-pads are secured tosuitable frames or backings D, mounted on spiral or other springs D inthe outer case or box A. The pads are arranged face to face in theordinary way and are constructed alike. Each pad is made up of a seriesof parallel strips of leather or other suitable material D arranged atan angle to the vertical, as shown 5 in Fig. 1, and the two pads,forming a pair, are arranged with the strips inclined in oppositedirections. The strips D are left free at both ends and are secured ingrooves or recesses D*, formed in the pad frame or backing D. Ifdesired, the strips D" may be secured at the upper ends in longitudinalpieces of the same material of a hardened character, fastened in anysuitable manner to the pad frame or backing D. .At convenient placesbetween the strips D bunches of bristles (Z or other suitable materialare fixed to form ledges onto which the polishing-powder will fall andwhere it will be held during the cleaning. 5

The knife-holder is in the form of a movable frame mounted on horizontalguide-rods E, on or fixed to the upper part of the outer case or box A.The knife-holder frame is made to clamp the knife-handles, being madewith 7 one fixed and one movable part.

In the knife-holder shown in Figs. 1 and 2 one series ofclampingblocks,f, is secured to the fixed bar F of the knife-holder, theother series of clamping-blocks, f, being secured to the movable bar F,which latter is secured to a bracket F having a threaded aperturetherethrough in which engages the screw-bolt G, mounted in the bearing Gand operated by a suitable handle G 30 In the modification shown in Fig.6 the clamping-blocks are kept in the closed posi tion by means of thespring H, which bears on the bracket .F and bearing G. The blocks areopened by means of a cam-lever J on the rod K, which latter is securedto the bracket F said cam-lever taking against the outside of bearing G.

In the modification shown in Figs. 4 and 5 a knife-holder adapted toreceive one knife 9 only is shown. In this form the movable bar F,carrying the movable clamping-blockf, is mounted on the top of two fixedbarsF instead of to one side. Otherwise this modification is constructedand operated in the same way as that shown in Fig. 6.

It Will be observed that in all the forms of the knife-holder the clampsare arranged so as to hold the knife-handle fore and aft relatively tothe direction of travel of the holder, so that there is no risk of theknife being left behind when the knife-holder is reciprocated.

The knife-holder frame is reciprocated on the horizontal guide-rods E bylever mechanism connected to a fixed center of motion N on the side ofthe outer case orbox A. In Fig. 1 the reciprocation is effected by theconnecting-rod L and crank M, operated by the crank-handle m. In Fig. 4a slotted lever P is employed, having an operating-handle 1), this beingsufficient where the travel is short; but any other suitable arrangementof levers may be used for effecting the desired reciprocatingstraightline movement of the knife-holder.

Having fully described my invention, what Iclaim, and desire to secureby Letters Patent, is-

1. A knife scouring or polishing machine comprising an outer frame orbox, two vertical resiliently-mounted polishing pads arranged face toface, a frame therefor, guiderods mounted on the outer frame, aknifeclamping frame mounted for reciprocation upon the said guide-rods,and means for reciprocating the knife-clamping frame comprising levermechanism attached to the clampingframe and turning on a fixed center onthe said outer frame or box.

2. A knife scouring or polishing machine comprising an outer frame orbox, two polishing-pads arranged vertically and face to face, each padbeing composed of leather strips arranged parallel and at an angle tothe vertical and a backing to which the strips are secured, springsbearing upon the backings of the pads so as to make the latter yielding,guide-rods mounted on the outer frame, a knife-clamping frame mountedfor reciprocation on the guiderods, and means for reciprocating theknifeclamping frame.

3. A knife scouring or polishing machine comprising an outer frame orbox, two vertical resiliently mounted polishing pads arranged face toface, a frame therefor, guiderods mounted on the outer frame, aknifeclamping frame mounted for reciprocation upon the said guide-rods,said clamping-frame comprising a fixed and a movable part,a series ofclamping-blocks secured to the fixed part, a second series of clamping-blocks secured to the movable part, a bracket to which the movablepart is secured, a screw-bolt working in said bracket, said screw-bolthaving an operatinghandle.

In testimony whereof I have hereunto set my hand, in presence of twosubscribing witnesses, this 22d day of December, 1903.

FREDERICK WILLIAM MARGET'IS.

Witnesses:

WILLIAM S. ABRAHAM, JOSEPH LAKE.

